Pith Number

pith:FD3SDHNB

pith:2009:FD3SDHNB2V2GVCAWBOIPSKDCWA

not attested not anchored not stored refs pending

Vacuum energy and the spacetime index of refraction: A new synthesis

M. Nouri-Zonoz

arxiv:0904.2904 v3 · 2009-04-19 · gr-qc · hep-th

Open paper page JSON Open Graph Bundle Merged state Verified badge What is a Pith Number?

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{FD3SDHNB2V2GVCAWBOIPSKDCWA}

Prints a linked badge after your title and injects PDF metadata. Compiles on arXiv. Learn more · Embed verified badge

Record completeness

1 Bitcoin timestamp

2 Internet Archive

3 Author claim open · sign in to claim

4 Citations open

5 Replications open

✓ Portable graph bundle live · download bundle · merged state

The bundle contains the canonical record plus signed events. A mirror can host it anywhere and recompute the same current state with the deterministic merge algorithm.

Receipt and verification

First computed	2026-05-18T04:39:50.463649Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

28f7219da1d5746a88160b90f92862b000a711c52d64e164f2d6d92b3b10b660

Aliases

arxiv: 0904.2904 · arxiv_version: 0904.2904v3 · doi: 10.48550/arxiv.0904.2904 · pith_short_12: FD3SDHNB2V2G · pith_short_16: FD3SDHNB2V2GVCAW · pith_short_8: FD3SDHNB

Agent API

Resolver JSON Graph JSON Events JSON Schema Signing key

Verify this Pith Number yourself

curl -sH 'Accept: application/ld+json' https://pith.science/pith/FD3SDHNB2V2GVCAWBOIPSKDCWA \
  | jq -c '.canonical_record' \
  | python3 -c "import sys,json,hashlib; b=json.dumps(json.loads(sys.stdin.read()), sort_keys=True, separators=(',',':'), ensure_ascii=False).encode(); print(hashlib.sha256(b).hexdigest())"
# expect: 28f7219da1d5746a88160b90f92862b000a711c52d64e164f2d6d92b3b10b660

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "2c05b0b71c26fb6b0c280945c2ddfb98c5dfbb5bb6a0c46daf3833b44ec2bddf",
    "cross_cats_sorted": [
      "hep-th"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "gr-qc",
    "submitted_at": "2009-04-19T10:13:06Z",
    "title_canon_sha256": "cb46bc6da4156797c369cc9ea6db899829193a1ac61ea579e6ba4e37c3f0dea1"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0904.2904",
    "kind": "arxiv",
    "version": 3
  }
}